1229420 has 12 divisors (see below), whose sum is σ = 2581824. Its totient is φ = 491760.

The previous prime is 1229401. The next prime is 1229443. The reversal of 1229420 is 249221.

It is a super-2 number, since 2×1229420² = 3022947072800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 61471 = 1229420 / (1 + 2 + 2 + 9 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1229392 and 1229401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30716 + ... + 30755.

It is an arithmetic number, because the mean of its divisors is an integer number (215152).

2^1229420 is an apocalyptic number.

1229420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1229420 is an abundant number, since it is smaller than the sum of its proper divisors (1352404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1229420 is a wasteful number, since it uses less digits than its factorization.

1229420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61480 (or 61478 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1229420 is about 1108.7921356142. The cubic root of 1229420 is about 107.1272832390.

The spelling of 1229420 in words is "one million, two hundred twenty-nine thousand, four hundred twenty".